Method of making pressure regulating devices



7 April 1940- G. e. BUDWIG 2,196,519

METHOD OF MAKING PRESSURE REGULATING DEVICES Filed Dec. 21, 193600000000000000 000000000000 ooovooooooo INVENTOR. GILBERT G. BUDW/G.

BY 6? ATTORNEYS.

s METHODj or; MAKING PRESSURE i v REGUL A ING DEVICES e 1' Gilbert G.Budw g, Burbank," Calif; assignor-to Budwig Manufacturing Company,Burbank, I 3 Calif., a corporation of California I Application ne emer'zi, 1936,- ser lnu iasiz l g eelims] (01. 291-157") f I v Myinvention relates to pressure regulating pressure reduction deviceoperating by friction; I 7 devices, and more particularly to a deviceadapt I to providea means and methodof cleaning small ed for use-inbeverage dispensing'devices such as apertures; to provide a means andmethod of is used for dispensingfbeer or; similar carbonated regulatingheat exchange in a device: dispensing 5 liquids; This application is a"vcontinuation-in w carbonated liquids; and to provide a simple and 5part of my and V. Ray Bemietts prior' applicaefiicient beveragedispensing device for use in tion entitled -Beverage dispensingapparatus,- conjunction with carbonated liquids.

' USerial'No. 91,132, filed July 17, 1936, now Patent Myinventionpossesses numerous other objects No; 2,132,011, dated October 4, 1938..v and "features of advantage, some of which, vt o- 10 In the operationof the" usual apparatus for gether with the foregoing, will be set forthin the 10 dispensing beer or the like, the degree of plesfollowingdescriptionot specific apparatus ernsure under which the beverage "isstored is lim- 'bodying" and utilizing my novel method? It is "it'ed bythe fact that thevelocity with which it. therefore to be understood thatmy method, is leaves the dispensing valve determines the charapplicableto other apparatus, and that I do not acter'or appearance thereofin thefinal conlimitmyselfi'in anyway, to the apparatus 'of the 15 tainer.When beer is dispensed it must be done present application, as I mayadopt various other gently so as to avoid excessive turbulence; uponapparatus embodiments, utilizing the method, the degree "of v whichdepends the resultant within the scope of the appended claims.

head. The ability to retain amaximum head Referri g to the d w dependsnot only, upon the number" and size v Figure 1 isa plan viewofrny'pressurereduc- 20 of individual gas bubbles formed as a result oftion' device before assembly.' v a 1 Y v a pressure decrease incident toescape from the Figure 2 is a V w p t y Sectidnfind. p y

dispenser, but alsoupon rarity of the opportuniin elevation' showingthe'completed pressure .reties offered the bubbles to unite with eachother. du i n ev ce in a l n a beve outlet;

Since the number of such opportunities depends H Figure 3 is a d i p t yin S ct on 25 upon the turbulence, it is highly desirable to ndvpartlylih elevation, (if-the mp e d pr sw maintain this factor at aminirn'um value. I sure :reductiondevice. v 1. e

For the above reasons, many installations disthe priorapplication-referredto bo e, we

'pense beer at pressuresin the neighborhood of there described apressure ct on device -39 seven o'r' ei ht ounds, and thus. t i wformed'by spirally-winding sheet metal around flow of beer fromtheflvalve. It is desirable to a corathe sh metal s' p eed by bossesutilize higher pressures if. it is also;p0ssible' t0 thereont'gdesirable-however, 1 order that dispense without turbulence. uniformity-.oi production be obtained, that ex The" pressure're'duction devicewhich forms a tremely accuratelspaci'ngs betweenthe e -oi v part/of mypresent invention is of suchv character the windingsv e used,v and, I'hav found that 3 that pressures in the n i hbo w twenty ordertostandardize the control ofvarious prespounds per Square inch may beemployed with r es a t Spacing have an efiiciency in pressure reductionsuch that turtolerance of less'ithayn eo h of 6 -r bulence'issubstantially eliminated, and-high flow th us ndthsof n nch, betweeneach "layer. I M

40 imaintainei it e v b have found it desirable, ingorder toobtain such40 I i Accordingly, among thex-obj'ects' of my'invenspacing, to utilizea' pe a -assemb y means and tion are: to provide a beverage dispensingap 11119011011, a d by lie sof th sineans and method 'paratu5 capab1e ofi dispensing under pressure Izhave' been able to completely standardizethe with substantially complete pressure. red t 3 production ofthese1pressure reduction devices. under conditions which substantiallyeliminate p oadlifi ELStO 1 8 11011. I':'Win'd Sheet metalhavturbulence'duringsuch reduction; to provide a s bfl h on in aspiralzaround pressure reduction device which is simple in cona core. In'doing so -however, I place the spacing structionand assembly andflen'dsitself to ,pro bosses toward the: edge of thesheet and in the ductionmethods; to providegavpressure'reduction center of the sheetrposition,bef re Winding, 'a device whichlnay be quickly replaced in service; spara sp sheet of ma r a which can o .to provide ameans and method-ofobtaining an later be; dissolved out :of the assembly; The; accuratespacing in a pressure reduction device; Wi in is th e or accu e y 1 6 iie to provide a means and metho'dfl'of accurately vmaking of ,thespiralandthe spacer is later reassembling alpressure:reductioni'device;topromoved. I i

. .vide'a means .for 'maintainingicloseispacings in .a -1'n;- addition;I ;.;have1-:i l is highly 55 Celluloid thousandths of and through thereduction device will behave in substantially the same manner as lateramounts.

My present invention may be more fully understood by directreference tothe drawing.

A-strip I, preferably of shim stock, and in one" embodimenttwo-thousandths of an inclrthick, two inches wide, and fifty-two incheslong, is providednear each edge thereof withv embossed spacers 2,leaving the'central portion of the strip free from embossing. A spacingribbon 3; one-- fourth of an inch wide,'in this particular ex-' ample,and three-thousandths of anfincb thick,

is placed along the center of the entire strip, and

in some instances the entire, s -ip may be of or similar cellulosematerial. ever, in certain instances, I may prefer to utilize a.cellulose ribbon for approximately one-half of the fifty-two inches, anda metal ribbon. i of exactly the same size and thickness for theremainder of the strip, the metal ribbon is to be utilizedbetween theoutermost turns of the wound strip. Inasmuch asI prefer to make theembossed spacers 2 fivean inch high, and the spacing ribbons 3 and 4only three-thousandths of an inch thick, it is obvious that v Wound;under pressure, that the spacing bosses will be reduced to the thicknessof the Celluloid ribbons, and thus the spacing is con ribbons, butmaintained by and metal trolled wholly by the the bosses. i

In winding the strip I ,with its associated spacing ribbons, I place acore 5, shown in' Figure 3, in a lathe or similar device, and wind thestrip, under pressure, on the core. After "the entire spiral is formed Iforce it into a restrainingshell 6, which is provided at one end withthreads 1, a Washer 8 and a knurled knob 9, in order that the device maybe inserted in the dispensing" .faucet I 0 wound under Inasmuch as thestrip has been relatively high pressure, at least I sufficiently high toreduce the height; of the spacing bosses, it will remain undercitsownpressure in the restraining shell-6, but I prefer, in

order to maintain the relative positions of the various layers, to drilla hole completely through therestraining shell, all layers of thewinding, and the central core, and insert arestrainihg pin H in thathole to maintain the complete relative position of the winding.

The assembled device is'now, of course, in- 1 operable, because of thepositioning therein of the Celluloid ribbon- The next step, therefore,is theremoval of this ribbon by a heating treatment. The open spaces inthe wound core are so narrow that it has been foundimpossible to removethe Celluloid from within the winding by any solvent means. 'I have,however, found that if the assembled windings are placed in an oven andbaked at approximately 650 F., the Celluloid is completely cooked'out,leaving no ash within the winding and with only the collection of an ashat both ends of the core.

There is no flame developed nor any explosion.

After the cookingprocess, the ash is removed each .have ascertained thatunder these tor in the success of the in the glass.

and in thislatter instance regulate the amount of when the strip is Ifrom the ends of the winding and the winding.

is open, and the flow of liquid through the winding is normalasto'volume. However; I conditions, While the volume of carbonated liquidwhich will pass through the core is normal, the functioning of thedevice, as far ascontrolling foam is concerned, is not good, and in factthe device will foam excessively.

In order to prevent this foaming,

surfaces of the winding,

through the winding a liquid under high presmild abrasive, such as vent.The accuracy and thoroughness of this polishing and cleaning operationis a major facfinal operation of the cleaning of the layers device. Thebetter the and the smoothing of the surface area in the stock in thewinding is made, the higher the beer temperature can be and still becontrollable by this device. polished device made as outlined, I havebeen able to serve beer which is as warm as 70 F. in the barrel and ashigh as 58 F. when served Obviously, wellabove those normallyencountered in practice', and I am thereforeable todispense beer at ahigher temperature Furthermore, by thus altering microscopically thesurface offthe winding, I can determine and sible to give a glass ofbeer which is dispensed at a given temperature. I believe this to beentirely novel, and furthermora'this head can be maintained constantrange of temperatures andpressures. accomplished without of beerflowing. 7 beer is chilled to a l" F. or less for serving; the ordinarybeerudis'penser requires a reduction in delivery volume so that aneleven-ounce glass requires as high as thirteen seconds to fill. At thehigher temperature outlined above, I am able to fill the. same glass insix. seconds and atfthe same time maintain the proper head on the beer.i

In describing my method of winding the shim stock to form my indescribed, I have above-stated that in some instances Celluloid isutilized only for about onehalf of the spacing ribbon and. that theother This is reduction of the volume half may be a metal ribbon 4, andthat this metal ribbon is utilized inthe outer turnsof the wind- In theexample dimensionally quoted, I pre- H I have found it highly desirableto clean or polish the opposed and I do this bypassing 7 thesetemperatures are and with a high volume.

head which it is pos- For example, ordinarily. when pressure reductiondevice here- 1 With a carefully cleaned and over a relatively widespacing ribbon, the remainder of the fiftyribbon isnot removed and staysin position.

throughout the operation of the device, and therefore efiectivelyprevents any liquid from passing through the outer'spaces of theWinding. Vi hen the windings'areso made, I have foundthat the firstglass of beer'drawn :afterthe faucet has been idle is notnearly soinclined to be wild, as usual, and I attribute thisto the fact thatunder ordinary" circumstances an idle faucet reaches room temperatureand when the first glass. of beer goes through at a lower tempera-,

ture, ready for drinking, that the sudden rise of the temperature in.the sive foaming, In almost'every' prior beer installation, the;firstglass. of beer through an idle faucet causes excesthe layers; second,

i under sufficient pressure to the same height as the thicknessofsaid-orr organic ribbon.

faucet is thrown away because it is so wild, or at least, if it is notthrown away, allowed to settle before utilizing a lengthy time firstglass.

It is my conclusion, therefore, that the air spaces between the outerlayers of the winding act as a heat insulator, preventing the rapidexchange of heat between the main metal body of the faucet and shell ofthe device, and the beer. The only place that heat can be read-- ilyconducted from the outside of the faucet to the beer flowing through thecentral channels is where the metal as this strip is very narrow, heatconduction to the beer'takes place only through a relatively small metalpath. I believe that this point has been l definitely proved byexperiments wherein the metal strip 4 was extended the full width of thewinding. Under these conditions the device delivers exceptionally fwildbeer for the first two or three glasses. By reducing the strip I reducethe wildness to the point where the first glass can be dispensed withina reasonably short time .without excessive foaming.

'I have therefore improved our prior device, first, by accuratelycontrolling the spacing of by. accurately controlling the tendency tofoam by polishing and cleaning the layer surfaces in the device; andthird, by providing insulating air spaces between the column of beer andthe metal body of the faucet.

I claim:

1 In a pressure reduction device having a spirally wound strip in aliquid'conduit to provide closely adjacent friction surfaces, a method"of assembly which comprises providing spacing bosses along the length ofthe strip, placing an organic ribbon on said strip of lesser thicknessthan the height of said bosses, winding the strip to deform said bossesganic ribbon, fixing the winding, and removing the organicribbonmaterial by raising the-temperature of the strip sufficiently to gasiiysaid 2. In a pressure reduction device havinga spirally wound strip in aliquid conduit to provide closely adjacent friction surfaces, a methodof assembly which comprises providing spacing bosses along the length ofthe strip, pla'cingan organic ribbon on said strip oflesser thicknessthan the height of said bosses, winding the strip under sufficientpressure to deform said bosses to the same height as the thickness ofsaid or- 1 ganic ribbon, fixing the winding, removing the organic ribbonmaterial, by gasification thereof and cleaning the opposed surfaces ofsaid winding by passing a liquid therethrough.

3; In a pressure reduction device having a} spirally wound strip in aliquid conduit to provide,

closely adjacent frictionsurfaces, a method-of assembly which comprisesproviding spacing bosses along the length of the strip, placing an itmust be it can be filledup, thus for the filling of the strip 4 iswound. Inasmuch provide a spacing tain a liquid by capillaritytherebetween, fixing organic ribbon on said stripof lesser thicknessthan the. height of said bosses, winding the strip under sufficientpressure to deform said bosses to the same height as the thickness ofsaid organic ribbon, fix'ng the winding, removing the organic ribbonmaterial by gasification thereof, and polishing the opposed passing aliquid containing a fine abrasive through the winding. I I

4, In a pressure reduction device having a spirally wound strip in aliquid conduit to provide closely adjacent friction surfaces, a methodof assembly which comprises winding said strip with an organic spacerbetween the turns thereof to provide a spacingbetween turns of a size tore tain a liquid by capillarity therebetween, fixing the winding, andremoving the spacer material by the application of heat to the windingto gasify said spacer. L I

5. In a pressure reduction device having a spirally wound strip in aliquid conduit to provide closely adjacent friction surfaces, a methodof assembly which comprises winding said strip with spirally wound stripin aliquidconduit to provide ,closely adjacent friction surfaces, ,amethod of assembly which comprises winding said strip with a cellulosespacer between the turns thereof to betweenturns .of a size to rethewinding, and removing the spacer material by baking the winding at atemperature of approximately 650 F 'to gasify said cellulose.

'7. In a pressure reduction device having a spirally wound strip in aliquid conduit to provide closely adjacent friction surfaces, a methodof assembly which comprises winding said strip with a cellulose spacerbetween the turns thereof to provide a spacing between turns of a sizeto retain a liquid by capillarity therebetween, fixing the winding,removing the spacer material by baking the winding at a temperature ofapproximately 650 F. togasify said cellulose and cleaning the winding bypassing liquid under high pressure therethrough after assembly. I

8. In a pressure reduction device having a spirally wound strip in aliquid conduit to provide closely adjacent friction surfaces, a methodof assembly which comprises winding said strip with a cellulose spacerbetween the turns thereof to provide a spacing between turns of a sizeto retain a liquid by capillarity therebetween, fixing the winding,removing the spacer material by baking the winding at a temperature ofapproximately 650 F.,to gasify said celluloseand polishing the windingby passinga liquid containing a mild abrasive therethrough afterassembly.

GILBERT G. BUDWIG.

surfaces of the wound strip by l

